PDFOffice_Windows_exe/PDF Office/CustomControl/CompositeControl/CustomComboControl.xaml

<UserControl
    x:Class="PDF_Office.CustomControl.CompositeControl.CustomComboControl"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:local="clr-namespace:PDF_Office.CustomControl.CompositeControl"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    x:Name="usercontrol"
    d:DesignHeight="450"
    d:DesignWidth="800"
    Loaded="UserControl_Loaded"
    mc:Ignorable="d">
    <UserControl.Resources>
        <ResourceDictionary>
            <ResourceDictionary.MergedDictionaries>
                <ResourceDictionary Source="../../Styles/SliderStyle.xaml" />
                <ResourceDictionary Source="../../Styles/CustomBtnStyle.xaml" />
            </ResourceDictionary.MergedDictionaries>

            <DataTemplate x:Key="numberData">
                <Grid>
                    <TextBlock
                        HorizontalAlignment="Center"
                        VerticalAlignment="Center"
                        Text="{Binding Content}" />
                </Grid>
            </DataTemplate>
        </ResourceDictionary>
    </UserControl.Resources>
    <Grid>
        <Grid>
            <Grid.ColumnDefinitions>
                <ColumnDefinition Width="*" />
                <ColumnDefinition Width="auto" />
            </Grid.ColumnDefinitions>

            <Border
                Height="32"
                HorizontalAlignment="Stretch"
                BorderBrush="#E2E3E6"
                BorderThickness="0">
                <Grid>
                    <ComboBox
                        Name="comBox"
                        Padding="10"
                        BorderBrush="#FFE2E3E6"
                        BorderThickness="1"
                        ItemTemplate="{StaticResource numberData}"
                        MaxDropDownHeight="200" />
                    <TextBox
                        Name="title"
                        Height="20"
                        Margin="10,0,35,0"
                        VerticalAlignment="Center"
                        Background="White"
                        BorderThickness="0"
                        FontFamily="Segoe UI"
                        FontSize="14"
                        IsReadOnly="True"
                        TextAlignment="Left" />
                </Grid>
            </Border>
        </Grid>
    </Grid>

</UserControl>